Odd lighting issue

[Hair Bear]

'04 1.9tdi Touran SE. 181k
No obvious faults or issues drives fine.
Turn on the side lights, all as it should be. 3-5 seconds later the ring around the light switch and the hazard switch back lights go out. Doesn't affect the operation of either, all lights work ok, the centre of the light switch stays lit and the hazard switch flashes as it should!
Any ideas or just good 'ole canbus?

[Hair Bear]

Fixed it.
Noticed yesterday that the bulb for the cigar lighter was out. Changed the burnt out bulb and all other switches are now back to normal!